608 UNGULATES. 



that it supports two pairs of points and one single point, like 

 the last lower molar tooth of the fossil jaw from Lot-et-Garonne, 

 described by Cuvier in the ' Ossemens Fossiles,' 1822, tom in. 

 p. 404 ; and like that from the Puy en Velay, described in the 

 posthumous 8vo. edition of the same work, vol. v. p. 480, both 

 of which are referred by Cuvier to the genus Anthracotherium. 

 The last molar in the present fossil differs, however, from the 

 teeth above cited, in the height of the connecting ridge of the 

 anterior pair of points, and in the development of the fifth or 

 posterior point from the apex of the angular ridge connecting the 

 posterior pair of points. 



From the closer resemblance which the fossil presents to the 

 true Lophiodons, it must be regarded as a member of the same 

 family of Tapiroid Pachyderms ; indicating therein a distinct sub- 

 genus, characterised by the want of parallelism of the two prin- 

 cipal transverse ridges, and the rudimental state of the posterior 

 talon in the last molar tooth of the lower jaw. The name 

 Coryphodon, which I have proposed for this subgenus, is derived 

 from xopvfri a point and o'J'ouf a tooth, and is significative of the 

 development of the angles of the ridges into points. 



A right canine tooth, obtained from the same eocene formation 

 as the foregoing molar, but from a different locality in England, either 

 belongs to the same extinct genus of Pachyderm or indicates 

 another. The general proportions of this tooth, its degree of 

 curvature, and the relative length of the crown and the fang, 

 accord pretty closely with those of the canines of different species 

 of Lophiodon figured by Cuvier in the ' Ossemens Fossiles,' 1822, 

 tom. II. pt. 1. pi. 10, figs. 312. & pi. 9, fig. 11. The crown 

 must have projected but a small distance beyond that of the 

 adjoining teeth, and have been quite concealed by the lips, as in 

 the Tapir, not forming a projecting tusk, and being shorter and 

 thicker than the canine of a carnivorous quadruped. Cuvier does 

 not give a figure of the transverse section of the crown of the 

 canine in any of his Lophiodons : that of the present tooth 

 is very characteristic, and resembles the transverse section of 

 the crown of the teeth of the great extinct reptile called 



